Enhanced low-temperature proton conductivity in hydrogen-intercalated brownmillerite oxide

Lu, Nianduan; Zhang, Zhuo; Wang, Yujia; Li, Hao-Bo; Qiao, Shuang; Zhao, Bo; He, Qing; Lu, Sicheng; Liu, Cong; Wu, Yongshun; Zhu, Mingtong; Lyu, Xiangyu; Chen, Xiaokun; Li, Zhuolu; Wang, Meng; Zhang, Jingzhao; Tsang, Sze Chun; Guo, Jingwen; Yang, Shicheng; Zhang, Jianbing; Deng, Ke; Zhang, Ding; Ma, Jing; Ren, Jing; Wu, Yang; Zhu, Junyi; Tokura, Y.; Nan, Ce‐Wen; Wu, Jian; Yu, Pu

doi:10.1038/s41560-022-01166-8

Cited by 55 publications

(28 citation statements)

References 32 publications

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“…To test the dependence of hydrogenation on annealing temperature T a , we annealed AG‐BIO films in humid air at each T a for 12 h and performed an ex‐situ measurement using XRD θ−2θ scans ( Figure a). [ 13 ] By increasing T a , (006) and (008)BaInO 2.5 peaks disappeared near 100 °C, whereas the (003) and (004)BaInO 3 H peaks became visible. Increasing T a to > 300 °C removed the (003) and (004)BaInO 3 H peaks, and new intermediate peaks appeared at 2θ = 38.9° and 43.5°.…”

Section: Resultsmentioning

confidence: 99%

“…[ 8 ] Thus, the small hydrogen ions of H + : ≈28 pm (cf., other small ions of Li + : ≈60 pm and Na + : ≈95 pm) enable the fastest transport in solid‐state materials (e.g., in WO 3 ) with the highest diffusion coefficient (e.g., H + : ≈5.3 × 10 −10 cm 2 s −1 , Li + : ≈2.1 × 10 −10 cm 2 s −1 , Na + : ≈0.8 × 10 −10 cm 2 s −1 ). [ 9 ] Fuel cells have been a particular area of interest so far, [ 10–13 ] and next‐generation memories, transistors, and electrochromic windows are also of keen interest. [ 14–29 ] Usually, the noble metal palladium is used as a hydrogen catalytic reservoir.…”

Section: Introductionmentioning

confidence: 99%

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Solid‐State Catalytic Hydrogen Sponge Effects in BaInO_2.5 Epitaxial Films

Kim

Jeon

MacManus‐Driscoll

et al. 2023

Adv Funct Materials

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Gas sponges capable of absorbing, storing, and releasing ions in a reversible manner are in high demand for advanced electronics, energy devices, and sensors. Here, it is shown that brownmillerite BaInO2.5 epitaxial films exhibit the capability to act as solid‐state catalytic hydrogen sponges at a remarkably low temperature (≈100 °C). Compared to sintered pellets with random crystallographic orientations and many defects, BaInO2.5 epitaxial films give three orders of magnitude higher conductivity of hydrogen ions, which can be linked to the presence of well‐ordered 1D channels and lack of grain boundaries and other defects. Using scanning transmission electron microscopy, it is shown that hydrogen ions can be stored near InO4 tetrahedral layers of brownmillerite without destroying the parent framework. The high performance and reproducibility of the BaInO2.5 epitaxial films coupled with ultralow power consumption make them ideal candidates for neuromorphic devices and beyond.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solid‐State Catalytic Hydrogen Sponge Effects in BaInO_2.5 Epitaxial Films

Kim

Jeon

MacManus‐Driscoll

et al. 2023

Adv Funct Materials

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show abstract

Section: Introductionmentioning

confidence: 99%

“…These channels provide a migration grid that can effectively suppress anisotropic ion diffusion, and thus could be a promising strategy to improve the performance of electrochemical devices like solid oxide fuel cells [28][29][30] or proton-conducting fuel cells. 31,32 SrCoO 3Àd (SCO) is a typical TMO whose structure is sensitive to oxygen vacancies. Depending on d, SCO hosts a 2DV able to switch between an antiferromagnetic insulator and a ferromagnetic metal.…”

Section: Introductionmentioning

confidence: 99%

Highly-conductive Cu-substituted brownmillerite with emergent 3-dimensional oxygen vacancy channels

Han

et al. 2023

J. Mater. Chem. C

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“…Magneto-ionics refers to a particular mechanism for VCM in which voltage-driven ion transport (of, e.g. , O 2– , − Li + , F – , H + , − or N 3– − species) leads to a large and controllable modulation of magnetism without the need of strain transfer. This is different from voltage-controlled strain-mediated multiferroic heterostructures, which are less convenient for spintronics because repeated voltage actuation can lead to mechanical fatigue and eventual device failure.…”

mentioning

confidence: 99%

Regulating Oxygen Ion Transport at the Nanoscale to Enable Highly Cyclable Magneto-Ionic Control of Magnetism

Tan

Fuentes-Rodríguez

et al. 2023

ACS Nano

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Magneto-ionics refers to the control of magnetic properties of materials through voltage-driven ion motion. To generate effective electric fields, either solid or liquid electrolytes are utilized, which also serve as ion reservoirs. Thin solid electrolytes have difficulties in (i) withstanding high electric fields without electric pinholes and (ii) maintaining stable ion transport during long-term actuation. In turn, the use of liquid electrolytes can result in poor cyclability, thus limiting their applicability. Here we propose a nanoscale-engineered magneto-ionic architecture (comprising a thin solid electrolyte in contact with a liquid electrolyte) that drastically enhances cyclability while preserving sufficiently high electric fields to trigger ion motion. Specifically, we show that the insertion of a highly nanostructured (amorphous-like) Ta layer (with suitable thickness and electric resistivity) between a magneto-ionic target material (i.e., Co3O4) and the liquid electrolyte increases magneto-ionic cyclability from <30 cycles (when no Ta is inserted) to more than 800 cycles. Transmission electron microscopy together with variable energy positron annihilation spectroscopy reveals the crucial role of the generated TaO x interlayer as a solid electrolyte (i.e., ionic conductor) that improves magneto-ionic endurance by proper tuning of the types of voltage-driven structural defects. The Ta layer is very effective in trapping oxygen and hindering O2– ions from moving into the liquid electrolyte, thus keeping O2– motion mainly restricted between Co3O4 and Ta when voltage of alternating polarity is applied. We demonstrate that this approach provides a suitable strategy to boost magneto-ionics by combining the benefits of solid and liquid electrolytes in a synergetic manner.

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Enhanced low-temperature proton conductivity in hydrogen-intercalated brownmillerite oxide

Cited by 55 publications

References 32 publications

Solid‐State Catalytic Hydrogen Sponge Effects in BaInO_2.5 Epitaxial Films

Solid‐State Catalytic Hydrogen Sponge Effects in BaInO_2.5 Epitaxial Films

Highly-conductive Cu-substituted brownmillerite with emergent 3-dimensional oxygen vacancy channels

Regulating Oxygen Ion Transport at the Nanoscale to Enable Highly Cyclable Magneto-Ionic Control of Magnetism

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Enhanced low-temperature proton conductivity in hydrogen-intercalated brownmillerite oxide

Cited by 55 publications

References 32 publications

Solid‐State Catalytic Hydrogen Sponge Effects in BaInO2.5 Epitaxial Films

Solid‐State Catalytic Hydrogen Sponge Effects in BaInO2.5 Epitaxial Films

Highly-conductive Cu-substituted brownmillerite with emergent 3-dimensional oxygen vacancy channels

Regulating Oxygen Ion Transport at the Nanoscale to Enable Highly Cyclable Magneto-Ionic Control of Magnetism

Contact Info

Product

Resources

About

Solid‐State Catalytic Hydrogen Sponge Effects in BaInO_2.5 Epitaxial Films

Solid‐State Catalytic Hydrogen Sponge Effects in BaInO_2.5 Epitaxial Films